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Quadratics

Quadratics

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Question 37
a.

By completing the square, find in terms of the constant k k\,k the roots of the equation

x2+kx−1=0 x^2 + kx - 1 = 0 x2+kx−1=0
[4]
b.

Hence find the exact roots of the equation x2+2x−1=0x^2 + 2x - 1 = 0x2+2x−1=0

[2]
Markscheme

Quadratics Questions

  1. A Level
  2. /Maths
  3. /Quadratics

211 exam-style questions on Edexcel A Level Maths Quadratics, covering 2.1 Solving Quadratics, 2.2 Completing the Square, 2.3 Sketching Quadratic Graphs, 2.4 The Discriminant, and 2.5 Modelling with Quadratics. Each one has a worked solution and a mark scheme showing where the marks go.

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